HUNTSVILLE, Alabama -- Patchy fog could become dense in some areas this morning but will clear up in time for a warm day, according to the Huntsville office of the National Weather Service.

(Contributed by the National Weather Service)

Patchy fog could develop in the Tennessee Valley between 2 and 11 a.m. Most of it should be gone between 7 and 9 a.m. The fog could become locally dense with the lowest visibility being in valley locations and northeast Alabama.

The overnight low is near 53 degrees but will warm up to the low to mid-80s for this afternoon's high. It will stay clear with mild to no wind once the fog is gone. The mostly clear skies will remain tonight as the low gets into the upper 50s.

An upper low pressure system could result in a 20 percent chance of shows and thunderstorms tomorrow. The high will be near 80 degrees and the low will be in the upper 50s.